CN101182807A

CN101182807A - Continuous variable valve lift apparatus

Info

Publication number: CN101182807A
Application number: CNA2006101699841A
Authority: CN
Inventors: 金大成; 金宇泰; 金佰植; 金炯翼; 徐仁起; 韩东熙
Original assignee: Hyundai Motor Co
Current assignee: Hyundai Motor Co
Priority date: 2006-11-16
Filing date: 2006-12-26
Publication date: 2008-05-21
Anticipated expiration: 2026-12-26
Also published as: US7311073B1; KR20080044529A; KR100868209B1; DE102006062080A1; CN101182807B

Abstract

A continuous variable valve lift (CVVL) apparatus adjusting a valve lift, duration of valve opening and closing, and a valve timing includes a cam rotating by a cam shaft, a first shaft having a first radius, a second shaft having a second radius smaller than the first radius and coupled in the first shaft such that the first and second shafts are non-concentric, a roller moving upward and downward by a rotation of the cam and connected to the first shaft to be moved on the basis of a position of the first shaft, a first arm rotatably connected to the second shaft to be moved by the roller, and a second arm rotatably secured to a third shaft to open and close the valve by an operation of the first arm.

Description

Continuous variable air valve lift apparatus

The cross reference of related application

The application requires preference and the rights and interests of on November 16th, 2006 at the korean patent application NO.10-2006-0113490 of Korea S Department of Intellectual Property application, here in conjunction with its full content as a reference.

Technical field

The present invention relates to a continuous variable air valve lift apparatus (continuous variable valve liftapparatus).More particularly, the present invention relates to a variable air valve lift apparatus that has simple scheme (scheme) and strengthen the property.

Background technique

Usually, continuous variable air valve lift apparatus can valve timing be regulated on ground or valve lift is improved fuel consume and engine efficiency by changing.

According to prior art, continuous variable air valve lift apparatus can only be regulated valve lift.

That is,, can not regulate valve lift and valve opening and closing period simultaneously according to prior art.

Therefore, can not realize the optimization of fuel consume and engine output, thereby develop the device that to regulate valve lift and valve opening and closing period simultaneously.

Yet the problem of said apparatus is the scheme more complicated of taking, and efficient is lower, and manufacture cost rises.

In addition, according to the continuous variable air valve lift apparatus of prior art, having a problem is exactly that if valve lift reduces, the decline of valve opening speed has hindered the suction inlet stream, then can reduce engine efficiency.

The disclosed above-mentioned information of background technique part is just with helping understand background of the present invention, so it may contain the information that does not constitute by national prior art well-known to those skilled in the art.

Summary of the invention

The object of the present invention is to provide and a kind ofly have reduction procedure, improve performance and the continuous variable air valve lift apparatus of advantage such as reduce cost.

An exemplary embodiments of the present invention provides a kind of continuously variable valve lift (CVVL) device, it can regulate valve lift, valve opening closing period and valve timing, comprise by the cam of camshaft driven rotary, have first of predetermined radii, radius link to each other less than first radius and with first so that first corresponding to second rotation and be positioned at second of another location, under the cam rotation effect, move up and down and connect first with according to first position and mobile roller, be rotationally connected second with the first arm that moves under the roller effect and rotational fixation on the 3rd with effect at the first arm under second arm of open and close valve.

Roller can be a biserial bearing.

The first arm is just thin more away from second more.

The first arm can be realized by a projection, and an elastic component is connected between second and this projection.

This continuous variable air valve lift apparatus comprises that also one drives the motor of second rotation.

This motor can be a stepping motor.

Description of drawings

Fig. 1 is the stereogram of expression continuous variable air valve lift apparatus of one exemplary embodiments according to the present invention.

Fig. 2 is the exploded perspective view of expression one exemplary embodiments according to the present invention.

Fig. 3 shows the operation basic principle of the continuous variable air valve lift apparatus of one exemplary embodiments according to the present invention.

Fig. 4 to Fig. 6 shows the operation of the continuous variable air valve lift apparatus of one exemplary embodiments according to the present invention.

The description of reference numerals of primary element in the＜expression accompanying drawing 〉

101: cam

103: camshaft

105: the first

107: the second

109: roller

111: the first arm

113: the three

115: the second arms

117: valve

119: projection

121: elastic component

123: motor

Embodiment

Introduce an exemplary embodiments of the present invention below with reference to accompanying drawing.

Fig. 1 is the stereogram of expression continuous variable air valve lift apparatus of one exemplary embodiments according to the present invention, and Fig. 2 is the exploded perspective view of expression one exemplary embodiments according to the present invention.

As shown in Figure 1, according to an exemplary embodiments of the present invention, one regulates continuous variable air valve lift apparatus that valve lift, valve open and close endurance and valve timing comprises a cam 101, first 105, second 107, roller 109, the first arm 111 and second arm 115.

Cam 101 is by camshaft 103 driven rotary, and first 105 has a predetermined radii.

This predetermined radii can be according to the engine exhaust amount and difference, and this it will be apparent to those skilled in the art that.

Second 107 radius is less than first 105 radius and be connected on first 105, thereby on first 105 another location that is positioned at corresponding to second rotation.

Roller 109 is driven and is moved up and down by the rotation of cam 101, and it is connected on first 105 to move based on first 105 position.

The first arm 111 is pivotally attached on second 107 to move under the effect of roller 109.

On three 113 of second arm, 115 rotational fixation to the, with open and close valve 117 under the effect of the first arm 111.

With reference to figure 1 and Fig. 2, second 107 is fixed on the hole that is formed on first 105, the hole 203 of first 105 link arm 201, roller 109 link arms 201.

In addition, above-mentioned connecting body is connected on the first arm 111, and second 107 is connected on the hole 205 that is formed on the first arm 111.

That is, first 105 diameter is identical with the diameter in hole 203, second 107 diameter and the diameter that is formed on the hole on first 105 and to be formed on the diameter in the hole 205 on the first arm 111 identical.

In addition, elastic component 121 is connected to second 107, the second arm 115 and is connected to the 3rd 113.

Therefore, as shown in Figure 1, formed according to the present invention the continuous variable air valve lift apparatus of one exemplary embodiments.

Roller 109 can be a pair of row bearing.

That is, outer bearing 108 contact cams 101, inner bearing 110 connects the first arm 111.

The first arm 111 is along with far more just becoming thin more apart from second 107.

Therefore, if roller 109 promotes another part of the first arm 111, the radius of gyration of the first arm 111, that is, timing just changes.

Introduce above-mentioned timing below in detail.

Projection 119 is formed on the first arm 111, and elastic component 121 is connected between second 107 and the projection 119.

That is, if second 107 rotates counterclockwise, the position of roller 109 just changes.

At this moment, formed idle running (lost motion), elastic component 121 applies an elastic force for projection 119 and second 107 in the counterclockwise direction temporarily.

According to an exemplary embodiments of the present invention, this continuous variable air valve lift apparatus comprises that also one rotates second 107 motor 123.

That is, second 107 drives first 105 rotation under the effect that motor 123 rotates, and motor 123 can be a stepping motor.

Fig. 3 shows the operation basic principle of the continuous variable air valve lift apparatus of one exemplary embodiments according to the present invention, and Fig. 4 to Fig. 6 shows the operation of the continuous variable air valve lift apparatus of one exemplary embodiments according to the present invention.

That is, as shown in Figure 3, second 107 diameter is less than first 105 diameter, if second 107 rotation, first 105 also rotation.

If second 107 301 is rotated around its center, also rotate around second 107 center 301 at first 105 center 303.

Shown in Fig. 3 (a) first position equals Fig. 4, and the position of first shown in Fig. 3 (b) equals Fig. 5, and the position of first shown in Fig. 3 (c) equals Fig. 6.

That is, if second 107 position that turns to as shown in Figure 4, the inner bearing 110 of roller 109 just is in the position " a " of the first arm 111.

At this moment, if cam 101 rotations and promotion outer bearing 108, then inner bearing 110 push position " a ".

Because the first arm 111 is far away more just thin more from second 107, promptly, the closer to second 107 just thick more, be subjected to the turning effort of cam 101 and under the situation of push position " a " at inner bearing 110, the radius of gyration of the first arm 111 is less than the radius when inner bearing 110 push position " b ", " c ".

Therefore, shown in Fig. 4 (b), the first arm 111 promotes second arm 115, and valve 117 is opened, if cam is rotated further, and valve 117 closures.

In addition, as Fig. 5 and Fig. 6 (a) with (b), if inner bearing 110 push position " b ", " c " under second 107 effect of rotating, then the radius of gyration of the first arm 111 becomes big.

Therefore, one exemplary embodiments according to the present invention, the lift of valve 117 can change with second 107 rotation.

In addition, inner bearing 110 left in figure move and the situation of push position " b " or " c " under, will change valve opening and closed time.

That is, if inner bearing 110 moves to position " b " or " c ", valve opening and closed endurance just postpone.

In addition, if inner bearing 110 moves to position " b " or " c ", the timing of valve 117 also changes together.

In a word, the continuous variable air valve lift apparatus of exemplary embodiments according to the present invention can change lift, endurance and the timing of valve 117 simultaneously.

The exemplary embodiments according to the present invention has been introduced second 107 and has been rotated 120 ° the situation that is spaced apart, and still is not limited to this.

That is, to be controlled as at valve 117 under the situation of another angle, can control second 107 angle by control motor 123 at an easy rate.

According to an exemplary embodiments of the present invention, because scheme is simple, thus can reduce manufacture cost, and owing to can change lift, endurance and timing simultaneously, so can improve fuel consumption rate and engine performance.

Although be to introduce of the present inventionly in conjunction with being considered to most preferred embodiment at present, should be appreciated that the present invention is not limited to the disclosed embodiments, on the contrary, it is intended to cover and is included in claims aim and interior various remodeling and the equivalent structure of scope.

Claims

1. a continuously variable valve lift (CVVL) installs, and it can regulate valve lift, valve opening closing period and valve timing, comprising:

By the cam of camshaft driven rotary;

Have first of predetermined radii;

Second, its radius links to each other less than first radius and with first, and Placement makes the axle of winning be positioned at the another location corresponding to second rotation;

Roller moves up and down under the cam rotation effect and connects first to move according to first position;

The first arm is rotationally connected second to move under the roller effect; With

Second arm, rotational fixation on the 3rd with effect at the first arm under the open and close valve.

2. device as claimed in claim 1, wherein:

Roller comprises a biserial bearing.

3. device as claimed in claim 1, wherein:

The first arm is just thin more away from second more.

4. device as claimed in claim 1, wherein:

The first arm has a projection,

One elastic component is connected between second and this projection.

5. device as claimed in claim 1 also comprises:

One drives the motor of second rotation.

6. device as claimed in claim 5, wherein:

Described motor comprises stepping motor.